Abstract. The consumption of energy for cooling the indoor environment of buildings in Malaysia is high and mostly related to poor thermal performance of the building envelope. It is evident that reducing energy consumption of buildings has become vital, taking into considerations the limitation of conventional energy resources and the adverse effects associated with the use of such type of energy on the environment. Therefore, selecting the proper thermal properties of a building envelope play a major role in determining the energy consumption patterns and comfort conditions in enclosed spaces. The objective of this study is to investigate the potential application of rice husk (RH), corn cob (CC) and waste tea (WT) as an additive agent in a fired clay brick manufacturing to produce an improved thermal conductivity of final brick product. In the execution of this study, these agricultural wastes were mixed together with clay soil in different percentages, ranging from 0 %, 2.5 %, 5 %, 7.5 % and 10 % by weight. Physical and mechanical properties including soil physical properties, density, shrinkage, water absorption, compressive strength as well as thermal conductivity were measured, reported and discussed in accordance with BS 1377: Part 2: 1990, BS 3921: 1985, MS 76: 1972: Part 2 and ASTM C 518. The results show that RH at 7.5 % is the most effective combination to achieve low thermal conductivity of fired clay brick. This finding suggests that RH waste is a potentially good additive material to be used for thermal properties enhancement of the building envelope.
Research on the application of chitosan as an edible film and coating has been developed. However, its hydrophilic nature causes edible films and coatings to be sensitive to air humidity so that they have a low moisture barrier. In addition, chitosan also has low thermal stability. This research combines natural rubber which is hydrophobic with relatively high thermal stability with chitosan which is antibacterial. The composite film between latex and chitosan was made by using the pour solution method. The occurrence of composites between latex and chitosan was proven from the results of FTIR and SEM characterization. The results of TGA characterization showed that the latex film (sample L1) had the highest thermal stability and the latex-chitosan composite (sample L1C3) had the lowest thermal stability. In the antibacterial test, it was concluded that the latex-chitosan film composite did not have bacteriocidal properties which was thought to be caused by the amine group in chitosan which could not diffuse on the media because it had formed a composite with latex. Based on the results of characterization and tests that have been carried out, it is concluded that the latex-chitosan composite film has thermal stability, optimal morphology in oxygen exchange with carbon dioxide, and has unmissable bacteriostatic properties. bacteria, liquid droplets, and moisturizers are samples of the L1C1 formula which is a sample with a 1% chitosan content. Keywords: Latex; Chitosan; Chitosan Latex Composite Film; Solution Casting; Thermal Stability; Antibacterial
Abstract. In Malaysia, 45% of the average household electricity was consumed by air conditioners to create an acceptable indoor environment. This high energy consumption was mostly related to poor thermal performance of the building envelope. Therefore, selecting a low thermal conductivity of brick wall was of considerable importance in creating energy efficient buildings. Previously, numerous researchers reported the potential used of agricultural waste as an additive in building materials to enhance their thermal properties. The aim of this study is to examine how agricultural wastes from empty fruit bunch (EFB), coconut fibre (CF) and sugarcane bagasse (SB) can act as additive agents in a fired clay brick manufacturing process to produce a low thermal conductivity clay brick. In this study, these agricultural wastes were individually mixed with clay soil in different proportions ranging from 0%, 2.5%, 5%, 7.5% and 10% by weight. Physical and mechanical properties including soil physical properties, as well as thermal conductivity were performed in accordance with BS 1377: Part 2: 1990, BS 3921: 1985 and ASTM C518. The results reveal that incorporating 5% of EFB as an additive component into the brick making process significantly enhances the production of a low thermal conductivity clay brick as compared to other waste alternatives tested. This finding suggests that EFB waste was a potential additive material to be used for the thermal property enhancement of the building envelope.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.